As misogynist as this may sound, I usually design my characters based on what I personally prefer in someone's physical traits (which is why all of my female characters have long hair, among other things).

"I have been wondern, do you actually use your wings to fly or do ya just use magic?"

Flandre- "I've been in the basement. For about 495 years."
Marisa- "That's sweet, I only get weekends off."
_
Marisa- It's so hot, I'm gonna die here.
Reimu- If you die, I'll feed your corpse to the birds.
Remilia- My, it'd be fine if you'd let me take care of that.
Marisa- That's a definite no.

Only sometimes, though their current/normal size does not allow for take off (unproportional body to wing ratio doesn't allow actual flight); however, in their current state, they allow me to glide if I jumped from higher grounds.